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3 years ago

What is the product of 2(-5/7)

Mathematics

1 answer:

artcher [175]3 years ago

6 0

Answer:

-10/7

Step-by-step explanation:

2 / 1 x -5 / 7 = 2(-5) / 1 (7) = -10 / 7

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Estimate the sum 1.37 + 0.9

guajiro [1.7K]

$1.37 + 0.9\\\\\\=\dfrac{137}{100} + \dfrac{9}{10}\\\\\\=\dfrac{137}{100}+\dfrac{90}{100}\\\\\\=\dfrac{137+90}{100}\\\\\\=\dfrac{227}{100}\\\\\\=2.27$

8 0

2 years ago

Please Help!! Urgent ( Zoom in to see it better)

ruslelena [56]

1. You are trying to isolate "F" in the equation

$C=\frac{5}{9}(F-32)$ Multiply 9/5 on both sides

$(\frac{9}{5})C=(\frac{9}{5}) \frac{5}{9} (F-32)$

$\frac{9}{5}C=F-32$ Add 32 on both sides

$\frac{9}{5}C+32=F-32+32$

$\frac{9}{5}C+32=F$

THIS IS WRONG

2. You are trying to isolate "y" in the equation

$m=\frac{x+y+z}{3}$ Multiply 3 on both sides

3m = x + y + z Subtract x and z on both sides

3m - x - z = y

THIS IS CORRECT

3. Isolate "r"

$s=\frac{r}{r-1}$ Multiply (r - 1) on both sides

s(r - 1) = r Distribute s into (r - 1)

sr - s = r Subtract sr on both sides

-s = r - sr Factor out r from (r - sr)

-s = r(1 - s) Divide (1 - s) on both sides

$\frac{-s}{1-s}=r$

THIS IS WRONG

4. Isolate "b"

$A=\frac{1}{2}(a+b)$ Multiply 2 on both sides

2A = a + b Subtract a on both sides

2A - a = b

THIS IS CORRECT

5. Isolate "y"

$m=\frac{x+y}{2}$ Multiply 2 on both sides

2m = x + y Subtract x on both sides

2m - x = y

THIS IS WRONG

The 2nd and 4th one is right

8 0

3 years ago

1/3 of 2 feet=(?)inches 1/6 of 3 yards=(?)inches

melomori [17]

Problem 1

1 ft = 12 inches

2 ft = 24 inches (multiply both sides by 2)

Multiply by 1/3 to get (1/3)*24 = 24/3 = 8

<h3>Answer: 8 inches</h3>

========================================

Problem 2

1 yard = 3 feet

3 yards = 9 feet (multiply both sides by 3)

1 ft = 12 inches

9 ft = 108 inches (multiply both sides by 9)

so overall, 3 yards = 108 inches

Multiply this by 1/6

(1/6)*(108 inches) = 108/6 = 18 inches

<h3>Answer: 18 inches</h3>

note: 18 inches = 12 inches + 6 inches = 1 ft, 6 inches = 1.5 ft

5 0

3 years ago

Anna applies the brakes of her car , the car slows down uniformly from 15 m / s to rest in 2.5 s . How many metres before a stop

ladessa [460]

Answer:

given information

u=15m/ sec

v=0

t=2.5 sec

s=?

acceleration will be negative.

------------------------------------------

applying v=u+at

0=15+a x 2.5

-15=2.5a

a=-15/2.5

a= - 6m/sec

----------------------------

applying v^2= u^2+2as

0= 225+2x (-6) x s

s=225/12= 18.75 metre.

-------------------------------------

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8 0

3 years ago

Read 2 more answers

Which statement about the function is true?

Elenna [48]

Answer:

Function f(x) is positive for the values x ≤ -6 and x ≥ -2 and negative in the interval -6 ≤ x ≤ -2.

Step-by-step explanation:

As given in the graph,

Given function is a quadratic function, f(x) = (x + 2)(x + 6)

With x-intercepts of the function, x = -6 and -2

Graph below the x-axis represents the negative values of the function.

Graph above the x-axis represents the positive values of the function.

Therefore, function f(x) is positive for the values x ≤ -6 and x ≥ -2 and the function is negative in the interval -6 ≤ x ≤ -2.

7 0

3 years ago